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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /tools/perf/builtin-kwork.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/builtin-kwork.c')
-rw-r--r--tools/perf/builtin-kwork.c1857
1 files changed, 1857 insertions, 0 deletions
diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
new file mode 100644
index 0000000000..de2fbb7c56
--- /dev/null
+++ b/tools/perf/builtin-kwork.c
@@ -0,0 +1,1857 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * builtin-kwork.c
+ *
+ * Copyright (c) 2022 Huawei Inc, Yang Jihong <yangjihong1@huawei.com>
+ */
+
+#include "builtin.h"
+
+#include "util/data.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/header.h"
+#include "util/kwork.h"
+#include "util/debug.h"
+#include "util/session.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/string2.h"
+#include "util/callchain.h"
+#include "util/evsel_fprintf.h"
+#include "util/util.h"
+
+#include <subcmd/pager.h>
+#include <subcmd/parse-options.h>
+#include <traceevent/event-parse.h>
+
+#include <errno.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <linux/err.h>
+#include <linux/time64.h>
+#include <linux/zalloc.h>
+
+/*
+ * report header elements width
+ */
+#define PRINT_CPU_WIDTH 4
+#define PRINT_COUNT_WIDTH 9
+#define PRINT_RUNTIME_WIDTH 10
+#define PRINT_LATENCY_WIDTH 10
+#define PRINT_TIMESTAMP_WIDTH 17
+#define PRINT_KWORK_NAME_WIDTH 30
+#define RPINT_DECIMAL_WIDTH 3
+#define PRINT_BRACKETPAIR_WIDTH 2
+#define PRINT_TIME_UNIT_SEC_WIDTH 2
+#define PRINT_TIME_UNIT_MESC_WIDTH 3
+#define PRINT_RUNTIME_HEADER_WIDTH (PRINT_RUNTIME_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
+#define PRINT_LATENCY_HEADER_WIDTH (PRINT_LATENCY_WIDTH + PRINT_TIME_UNIT_MESC_WIDTH)
+#define PRINT_TIMEHIST_CPU_WIDTH (PRINT_CPU_WIDTH + PRINT_BRACKETPAIR_WIDTH)
+#define PRINT_TIMESTAMP_HEADER_WIDTH (PRINT_TIMESTAMP_WIDTH + PRINT_TIME_UNIT_SEC_WIDTH)
+
+struct sort_dimension {
+ const char *name;
+ int (*cmp)(struct kwork_work *l, struct kwork_work *r);
+ struct list_head list;
+};
+
+static int id_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ if (l->cpu > r->cpu)
+ return 1;
+ if (l->cpu < r->cpu)
+ return -1;
+
+ if (l->id > r->id)
+ return 1;
+ if (l->id < r->id)
+ return -1;
+
+ return 0;
+}
+
+static int count_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ if (l->nr_atoms > r->nr_atoms)
+ return 1;
+ if (l->nr_atoms < r->nr_atoms)
+ return -1;
+
+ return 0;
+}
+
+static int runtime_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ if (l->total_runtime > r->total_runtime)
+ return 1;
+ if (l->total_runtime < r->total_runtime)
+ return -1;
+
+ return 0;
+}
+
+static int max_runtime_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ if (l->max_runtime > r->max_runtime)
+ return 1;
+ if (l->max_runtime < r->max_runtime)
+ return -1;
+
+ return 0;
+}
+
+static int avg_latency_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ u64 avgl, avgr;
+
+ if (!r->nr_atoms)
+ return 1;
+ if (!l->nr_atoms)
+ return -1;
+
+ avgl = l->total_latency / l->nr_atoms;
+ avgr = r->total_latency / r->nr_atoms;
+
+ if (avgl > avgr)
+ return 1;
+ if (avgl < avgr)
+ return -1;
+
+ return 0;
+}
+
+static int max_latency_cmp(struct kwork_work *l, struct kwork_work *r)
+{
+ if (l->max_latency > r->max_latency)
+ return 1;
+ if (l->max_latency < r->max_latency)
+ return -1;
+
+ return 0;
+}
+
+static int sort_dimension__add(struct perf_kwork *kwork __maybe_unused,
+ const char *tok, struct list_head *list)
+{
+ size_t i;
+ static struct sort_dimension max_sort_dimension = {
+ .name = "max",
+ .cmp = max_runtime_cmp,
+ };
+ static struct sort_dimension id_sort_dimension = {
+ .name = "id",
+ .cmp = id_cmp,
+ };
+ static struct sort_dimension runtime_sort_dimension = {
+ .name = "runtime",
+ .cmp = runtime_cmp,
+ };
+ static struct sort_dimension count_sort_dimension = {
+ .name = "count",
+ .cmp = count_cmp,
+ };
+ static struct sort_dimension avg_sort_dimension = {
+ .name = "avg",
+ .cmp = avg_latency_cmp,
+ };
+ struct sort_dimension *available_sorts[] = {
+ &id_sort_dimension,
+ &max_sort_dimension,
+ &count_sort_dimension,
+ &runtime_sort_dimension,
+ &avg_sort_dimension,
+ };
+
+ if (kwork->report == KWORK_REPORT_LATENCY)
+ max_sort_dimension.cmp = max_latency_cmp;
+
+ for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
+ if (!strcmp(available_sorts[i]->name, tok)) {
+ list_add_tail(&available_sorts[i]->list, list);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static void setup_sorting(struct perf_kwork *kwork,
+ const struct option *options,
+ const char * const usage_msg[])
+{
+ char *tmp, *tok, *str = strdup(kwork->sort_order);
+
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ if (sort_dimension__add(kwork, tok, &kwork->sort_list) < 0)
+ usage_with_options_msg(usage_msg, options,
+ "Unknown --sort key: `%s'", tok);
+ }
+
+ pr_debug("Sort order: %s\n", kwork->sort_order);
+ free(str);
+}
+
+static struct kwork_atom *atom_new(struct perf_kwork *kwork,
+ struct perf_sample *sample)
+{
+ unsigned long i;
+ struct kwork_atom_page *page;
+ struct kwork_atom *atom = NULL;
+
+ list_for_each_entry(page, &kwork->atom_page_list, list) {
+ if (!bitmap_full(page->bitmap, NR_ATOM_PER_PAGE)) {
+ i = find_first_zero_bit(page->bitmap, NR_ATOM_PER_PAGE);
+ BUG_ON(i >= NR_ATOM_PER_PAGE);
+ atom = &page->atoms[i];
+ goto found_atom;
+ }
+ }
+
+ /*
+ * new page
+ */
+ page = zalloc(sizeof(*page));
+ if (page == NULL) {
+ pr_err("Failed to zalloc kwork atom page\n");
+ return NULL;
+ }
+
+ i = 0;
+ atom = &page->atoms[0];
+ list_add_tail(&page->list, &kwork->atom_page_list);
+
+found_atom:
+ __set_bit(i, page->bitmap);
+ atom->time = sample->time;
+ atom->prev = NULL;
+ atom->page_addr = page;
+ atom->bit_inpage = i;
+ return atom;
+}
+
+static void atom_free(struct kwork_atom *atom)
+{
+ if (atom->prev != NULL)
+ atom_free(atom->prev);
+
+ __clear_bit(atom->bit_inpage,
+ ((struct kwork_atom_page *)atom->page_addr)->bitmap);
+}
+
+static void atom_del(struct kwork_atom *atom)
+{
+ list_del(&atom->list);
+ atom_free(atom);
+}
+
+static int work_cmp(struct list_head *list,
+ struct kwork_work *l, struct kwork_work *r)
+{
+ int ret = 0;
+ struct sort_dimension *sort;
+
+ BUG_ON(list_empty(list));
+
+ list_for_each_entry(sort, list, list) {
+ ret = sort->cmp(l, r);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static struct kwork_work *work_search(struct rb_root_cached *root,
+ struct kwork_work *key,
+ struct list_head *sort_list)
+{
+ int cmp;
+ struct kwork_work *work;
+ struct rb_node *node = root->rb_root.rb_node;
+
+ while (node) {
+ work = container_of(node, struct kwork_work, node);
+ cmp = work_cmp(sort_list, key, work);
+ if (cmp > 0)
+ node = node->rb_left;
+ else if (cmp < 0)
+ node = node->rb_right;
+ else {
+ if (work->name == NULL)
+ work->name = key->name;
+ return work;
+ }
+ }
+ return NULL;
+}
+
+static void work_insert(struct rb_root_cached *root,
+ struct kwork_work *key, struct list_head *sort_list)
+{
+ int cmp;
+ bool leftmost = true;
+ struct kwork_work *cur;
+ struct rb_node **new = &(root->rb_root.rb_node), *parent = NULL;
+
+ while (*new) {
+ cur = container_of(*new, struct kwork_work, node);
+ parent = *new;
+ cmp = work_cmp(sort_list, key, cur);
+
+ if (cmp > 0)
+ new = &((*new)->rb_left);
+ else {
+ new = &((*new)->rb_right);
+ leftmost = false;
+ }
+ }
+
+ rb_link_node(&key->node, parent, new);
+ rb_insert_color_cached(&key->node, root, leftmost);
+}
+
+static struct kwork_work *work_new(struct kwork_work *key)
+{
+ int i;
+ struct kwork_work *work = zalloc(sizeof(*work));
+
+ if (work == NULL) {
+ pr_err("Failed to zalloc kwork work\n");
+ return NULL;
+ }
+
+ for (i = 0; i < KWORK_TRACE_MAX; i++)
+ INIT_LIST_HEAD(&work->atom_list[i]);
+
+ work->id = key->id;
+ work->cpu = key->cpu;
+ work->name = key->name;
+ work->class = key->class;
+ return work;
+}
+
+static struct kwork_work *work_findnew(struct rb_root_cached *root,
+ struct kwork_work *key,
+ struct list_head *sort_list)
+{
+ struct kwork_work *work = work_search(root, key, sort_list);
+
+ if (work != NULL)
+ return work;
+
+ work = work_new(key);
+ if (work)
+ work_insert(root, work, sort_list);
+
+ return work;
+}
+
+static void profile_update_timespan(struct perf_kwork *kwork,
+ struct perf_sample *sample)
+{
+ if (!kwork->summary)
+ return;
+
+ if ((kwork->timestart == 0) || (kwork->timestart > sample->time))
+ kwork->timestart = sample->time;
+
+ if (kwork->timeend < sample->time)
+ kwork->timeend = sample->time;
+}
+
+static bool profile_event_match(struct perf_kwork *kwork,
+ struct kwork_work *work,
+ struct perf_sample *sample)
+{
+ int cpu = work->cpu;
+ u64 time = sample->time;
+ struct perf_time_interval *ptime = &kwork->ptime;
+
+ if ((kwork->cpu_list != NULL) && !test_bit(cpu, kwork->cpu_bitmap))
+ return false;
+
+ if (((ptime->start != 0) && (ptime->start > time)) ||
+ ((ptime->end != 0) && (ptime->end < time)))
+ return false;
+
+ if ((kwork->profile_name != NULL) &&
+ (work->name != NULL) &&
+ (strcmp(work->name, kwork->profile_name) != 0))
+ return false;
+
+ profile_update_timespan(kwork, sample);
+ return true;
+}
+
+static int work_push_atom(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ enum kwork_trace_type src_type,
+ enum kwork_trace_type dst_type,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine,
+ struct kwork_work **ret_work)
+{
+ struct kwork_atom *atom, *dst_atom;
+ struct kwork_work *work, key;
+
+ BUG_ON(class->work_init == NULL);
+ class->work_init(class, &key, evsel, sample, machine);
+
+ atom = atom_new(kwork, sample);
+ if (atom == NULL)
+ return -1;
+
+ work = work_findnew(&class->work_root, &key, &kwork->cmp_id);
+ if (work == NULL) {
+ atom_free(atom);
+ return -1;
+ }
+
+ if (!profile_event_match(kwork, work, sample)) {
+ atom_free(atom);
+ return 0;
+ }
+
+ if (dst_type < KWORK_TRACE_MAX) {
+ dst_atom = list_last_entry_or_null(&work->atom_list[dst_type],
+ struct kwork_atom, list);
+ if (dst_atom != NULL) {
+ atom->prev = dst_atom;
+ list_del(&dst_atom->list);
+ }
+ }
+
+ if (ret_work != NULL)
+ *ret_work = work;
+
+ list_add_tail(&atom->list, &work->atom_list[src_type]);
+
+ return 0;
+}
+
+static struct kwork_atom *work_pop_atom(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ enum kwork_trace_type src_type,
+ enum kwork_trace_type dst_type,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine,
+ struct kwork_work **ret_work)
+{
+ struct kwork_atom *atom, *src_atom;
+ struct kwork_work *work, key;
+
+ BUG_ON(class->work_init == NULL);
+ class->work_init(class, &key, evsel, sample, machine);
+
+ work = work_findnew(&class->work_root, &key, &kwork->cmp_id);
+ if (ret_work != NULL)
+ *ret_work = work;
+
+ if (work == NULL)
+ return NULL;
+
+ if (!profile_event_match(kwork, work, sample))
+ return NULL;
+
+ atom = list_last_entry_or_null(&work->atom_list[dst_type],
+ struct kwork_atom, list);
+ if (atom != NULL)
+ return atom;
+
+ src_atom = atom_new(kwork, sample);
+ if (src_atom != NULL)
+ list_add_tail(&src_atom->list, &work->atom_list[src_type]);
+ else {
+ if (ret_work != NULL)
+ *ret_work = NULL;
+ }
+
+ return NULL;
+}
+
+static void report_update_exit_event(struct kwork_work *work,
+ struct kwork_atom *atom,
+ struct perf_sample *sample)
+{
+ u64 delta;
+ u64 exit_time = sample->time;
+ u64 entry_time = atom->time;
+
+ if ((entry_time != 0) && (exit_time >= entry_time)) {
+ delta = exit_time - entry_time;
+ if ((delta > work->max_runtime) ||
+ (work->max_runtime == 0)) {
+ work->max_runtime = delta;
+ work->max_runtime_start = entry_time;
+ work->max_runtime_end = exit_time;
+ }
+ work->total_runtime += delta;
+ work->nr_atoms++;
+ }
+}
+
+static int report_entry_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ return work_push_atom(kwork, class, KWORK_TRACE_ENTRY,
+ KWORK_TRACE_MAX, evsel, sample,
+ machine, NULL);
+}
+
+static int report_exit_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct kwork_atom *atom = NULL;
+ struct kwork_work *work = NULL;
+
+ atom = work_pop_atom(kwork, class, KWORK_TRACE_EXIT,
+ KWORK_TRACE_ENTRY, evsel, sample,
+ machine, &work);
+ if (work == NULL)
+ return -1;
+
+ if (atom != NULL) {
+ report_update_exit_event(work, atom, sample);
+ atom_del(atom);
+ }
+
+ return 0;
+}
+
+static void latency_update_entry_event(struct kwork_work *work,
+ struct kwork_atom *atom,
+ struct perf_sample *sample)
+{
+ u64 delta;
+ u64 entry_time = sample->time;
+ u64 raise_time = atom->time;
+
+ if ((raise_time != 0) && (entry_time >= raise_time)) {
+ delta = entry_time - raise_time;
+ if ((delta > work->max_latency) ||
+ (work->max_latency == 0)) {
+ work->max_latency = delta;
+ work->max_latency_start = raise_time;
+ work->max_latency_end = entry_time;
+ }
+ work->total_latency += delta;
+ work->nr_atoms++;
+ }
+}
+
+static int latency_raise_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ return work_push_atom(kwork, class, KWORK_TRACE_RAISE,
+ KWORK_TRACE_MAX, evsel, sample,
+ machine, NULL);
+}
+
+static int latency_entry_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct kwork_atom *atom = NULL;
+ struct kwork_work *work = NULL;
+
+ atom = work_pop_atom(kwork, class, KWORK_TRACE_ENTRY,
+ KWORK_TRACE_RAISE, evsel, sample,
+ machine, &work);
+ if (work == NULL)
+ return -1;
+
+ if (atom != NULL) {
+ latency_update_entry_event(work, atom, sample);
+ atom_del(atom);
+ }
+
+ return 0;
+}
+
+static void timehist_save_callchain(struct perf_kwork *kwork,
+ struct perf_sample *sample,
+ struct evsel *evsel,
+ struct machine *machine)
+{
+ struct symbol *sym;
+ struct thread *thread;
+ struct callchain_cursor_node *node;
+ struct callchain_cursor *cursor;
+
+ if (!kwork->show_callchain || sample->callchain == NULL)
+ return;
+
+ /* want main thread for process - has maps */
+ thread = machine__findnew_thread(machine, sample->pid, sample->pid);
+ if (thread == NULL) {
+ pr_debug("Failed to get thread for pid %d\n", sample->pid);
+ return;
+ }
+
+ cursor = get_tls_callchain_cursor();
+
+ if (thread__resolve_callchain(thread, cursor, evsel, sample,
+ NULL, NULL, kwork->max_stack + 2) != 0) {
+ pr_debug("Failed to resolve callchain, skipping\n");
+ goto out_put;
+ }
+
+ callchain_cursor_commit(cursor);
+
+ while (true) {
+ node = callchain_cursor_current(cursor);
+ if (node == NULL)
+ break;
+
+ sym = node->ms.sym;
+ if (sym) {
+ if (!strcmp(sym->name, "__softirqentry_text_start") ||
+ !strcmp(sym->name, "__do_softirq"))
+ sym->ignore = 1;
+ }
+
+ callchain_cursor_advance(cursor);
+ }
+
+out_put:
+ thread__put(thread);
+}
+
+static void timehist_print_event(struct perf_kwork *kwork,
+ struct kwork_work *work,
+ struct kwork_atom *atom,
+ struct perf_sample *sample,
+ struct addr_location *al)
+{
+ char entrytime[32], exittime[32];
+ char kwork_name[PRINT_KWORK_NAME_WIDTH];
+
+ /*
+ * runtime start
+ */
+ timestamp__scnprintf_usec(atom->time,
+ entrytime, sizeof(entrytime));
+ printf(" %*s ", PRINT_TIMESTAMP_WIDTH, entrytime);
+
+ /*
+ * runtime end
+ */
+ timestamp__scnprintf_usec(sample->time,
+ exittime, sizeof(exittime));
+ printf(" %*s ", PRINT_TIMESTAMP_WIDTH, exittime);
+
+ /*
+ * cpu
+ */
+ printf(" [%0*d] ", PRINT_CPU_WIDTH, work->cpu);
+
+ /*
+ * kwork name
+ */
+ if (work->class && work->class->work_name) {
+ work->class->work_name(work, kwork_name,
+ PRINT_KWORK_NAME_WIDTH);
+ printf(" %-*s ", PRINT_KWORK_NAME_WIDTH, kwork_name);
+ } else
+ printf(" %-*s ", PRINT_KWORK_NAME_WIDTH, "");
+
+ /*
+ *runtime
+ */
+ printf(" %*.*f ",
+ PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)(sample->time - atom->time) / NSEC_PER_MSEC);
+
+ /*
+ * delaytime
+ */
+ if (atom->prev != NULL)
+ printf(" %*.*f ", PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)(atom->time - atom->prev->time) / NSEC_PER_MSEC);
+ else
+ printf(" %*s ", PRINT_LATENCY_WIDTH, " ");
+
+ /*
+ * callchain
+ */
+ if (kwork->show_callchain) {
+ struct callchain_cursor *cursor = get_tls_callchain_cursor();
+
+ if (cursor == NULL)
+ return;
+
+ printf(" ");
+
+ sample__fprintf_sym(sample, al, 0,
+ EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |
+ EVSEL__PRINT_CALLCHAIN_ARROW |
+ EVSEL__PRINT_SKIP_IGNORED,
+ cursor, symbol_conf.bt_stop_list,
+ stdout);
+ }
+
+ printf("\n");
+}
+
+static int timehist_raise_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ return work_push_atom(kwork, class, KWORK_TRACE_RAISE,
+ KWORK_TRACE_MAX, evsel, sample,
+ machine, NULL);
+}
+
+static int timehist_entry_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ int ret;
+ struct kwork_work *work = NULL;
+
+ ret = work_push_atom(kwork, class, KWORK_TRACE_ENTRY,
+ KWORK_TRACE_RAISE, evsel, sample,
+ machine, &work);
+ if (ret)
+ return ret;
+
+ if (work != NULL)
+ timehist_save_callchain(kwork, sample, evsel, machine);
+
+ return 0;
+}
+
+static int timehist_exit_event(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct kwork_atom *atom = NULL;
+ struct kwork_work *work = NULL;
+ struct addr_location al;
+ int ret = 0;
+
+ addr_location__init(&al);
+ if (machine__resolve(machine, &al, sample) < 0) {
+ pr_debug("Problem processing event, skipping it\n");
+ ret = -1;
+ goto out;
+ }
+
+ atom = work_pop_atom(kwork, class, KWORK_TRACE_EXIT,
+ KWORK_TRACE_ENTRY, evsel, sample,
+ machine, &work);
+ if (work == NULL) {
+ ret = -1;
+ goto out;
+ }
+
+ if (atom != NULL) {
+ work->nr_atoms++;
+ timehist_print_event(kwork, work, atom, sample, &al);
+ atom_del(atom);
+ }
+
+out:
+ addr_location__exit(&al);
+ return ret;
+}
+
+static struct kwork_class kwork_irq;
+static int process_irq_handler_entry_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->entry_event)
+ return kwork->tp_handler->entry_event(kwork, &kwork_irq,
+ evsel, sample, machine);
+ return 0;
+}
+
+static int process_irq_handler_exit_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->exit_event)
+ return kwork->tp_handler->exit_event(kwork, &kwork_irq,
+ evsel, sample, machine);
+ return 0;
+}
+
+const struct evsel_str_handler irq_tp_handlers[] = {
+ { "irq:irq_handler_entry", process_irq_handler_entry_event, },
+ { "irq:irq_handler_exit", process_irq_handler_exit_event, },
+};
+
+static int irq_class_init(struct kwork_class *class,
+ struct perf_session *session)
+{
+ if (perf_session__set_tracepoints_handlers(session, irq_tp_handlers)) {
+ pr_err("Failed to set irq tracepoints handlers\n");
+ return -1;
+ }
+
+ class->work_root = RB_ROOT_CACHED;
+ return 0;
+}
+
+static void irq_work_init(struct kwork_class *class,
+ struct kwork_work *work,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine __maybe_unused)
+{
+ work->class = class;
+ work->cpu = sample->cpu;
+ work->id = evsel__intval(evsel, sample, "irq");
+ work->name = evsel__strval(evsel, sample, "name");
+}
+
+static void irq_work_name(struct kwork_work *work, char *buf, int len)
+{
+ snprintf(buf, len, "%s:%" PRIu64 "", work->name, work->id);
+}
+
+static struct kwork_class kwork_irq = {
+ .name = "irq",
+ .type = KWORK_CLASS_IRQ,
+ .nr_tracepoints = 2,
+ .tp_handlers = irq_tp_handlers,
+ .class_init = irq_class_init,
+ .work_init = irq_work_init,
+ .work_name = irq_work_name,
+};
+
+static struct kwork_class kwork_softirq;
+static int process_softirq_raise_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->raise_event)
+ return kwork->tp_handler->raise_event(kwork, &kwork_softirq,
+ evsel, sample, machine);
+
+ return 0;
+}
+
+static int process_softirq_entry_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->entry_event)
+ return kwork->tp_handler->entry_event(kwork, &kwork_softirq,
+ evsel, sample, machine);
+
+ return 0;
+}
+
+static int process_softirq_exit_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->exit_event)
+ return kwork->tp_handler->exit_event(kwork, &kwork_softirq,
+ evsel, sample, machine);
+
+ return 0;
+}
+
+const struct evsel_str_handler softirq_tp_handlers[] = {
+ { "irq:softirq_raise", process_softirq_raise_event, },
+ { "irq:softirq_entry", process_softirq_entry_event, },
+ { "irq:softirq_exit", process_softirq_exit_event, },
+};
+
+static int softirq_class_init(struct kwork_class *class,
+ struct perf_session *session)
+{
+ if (perf_session__set_tracepoints_handlers(session,
+ softirq_tp_handlers)) {
+ pr_err("Failed to set softirq tracepoints handlers\n");
+ return -1;
+ }
+
+ class->work_root = RB_ROOT_CACHED;
+ return 0;
+}
+
+static char *evsel__softirq_name(struct evsel *evsel, u64 num)
+{
+ char *name = NULL;
+ bool found = false;
+ struct tep_print_flag_sym *sym = NULL;
+ struct tep_print_arg *args = evsel->tp_format->print_fmt.args;
+
+ if ((args == NULL) || (args->next == NULL))
+ return NULL;
+
+ /* skip softirq field: "REC->vec" */
+ for (sym = args->next->symbol.symbols; sym != NULL; sym = sym->next) {
+ if ((eval_flag(sym->value) == (unsigned long long)num) &&
+ (strlen(sym->str) != 0)) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ return NULL;
+
+ name = strdup(sym->str);
+ if (name == NULL) {
+ pr_err("Failed to copy symbol name\n");
+ return NULL;
+ }
+ return name;
+}
+
+static void softirq_work_init(struct kwork_class *class,
+ struct kwork_work *work,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine __maybe_unused)
+{
+ u64 num = evsel__intval(evsel, sample, "vec");
+
+ work->id = num;
+ work->class = class;
+ work->cpu = sample->cpu;
+ work->name = evsel__softirq_name(evsel, num);
+}
+
+static void softirq_work_name(struct kwork_work *work, char *buf, int len)
+{
+ snprintf(buf, len, "(s)%s:%" PRIu64 "", work->name, work->id);
+}
+
+static struct kwork_class kwork_softirq = {
+ .name = "softirq",
+ .type = KWORK_CLASS_SOFTIRQ,
+ .nr_tracepoints = 3,
+ .tp_handlers = softirq_tp_handlers,
+ .class_init = softirq_class_init,
+ .work_init = softirq_work_init,
+ .work_name = softirq_work_name,
+};
+
+static struct kwork_class kwork_workqueue;
+static int process_workqueue_activate_work_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->raise_event)
+ return kwork->tp_handler->raise_event(kwork, &kwork_workqueue,
+ evsel, sample, machine);
+
+ return 0;
+}
+
+static int process_workqueue_execute_start_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->entry_event)
+ return kwork->tp_handler->entry_event(kwork, &kwork_workqueue,
+ evsel, sample, machine);
+
+ return 0;
+}
+
+static int process_workqueue_execute_end_event(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
+
+ if (kwork->tp_handler->exit_event)
+ return kwork->tp_handler->exit_event(kwork, &kwork_workqueue,
+ evsel, sample, machine);
+
+ return 0;
+}
+
+const struct evsel_str_handler workqueue_tp_handlers[] = {
+ { "workqueue:workqueue_activate_work", process_workqueue_activate_work_event, },
+ { "workqueue:workqueue_execute_start", process_workqueue_execute_start_event, },
+ { "workqueue:workqueue_execute_end", process_workqueue_execute_end_event, },
+};
+
+static int workqueue_class_init(struct kwork_class *class,
+ struct perf_session *session)
+{
+ if (perf_session__set_tracepoints_handlers(session,
+ workqueue_tp_handlers)) {
+ pr_err("Failed to set workqueue tracepoints handlers\n");
+ return -1;
+ }
+
+ class->work_root = RB_ROOT_CACHED;
+ return 0;
+}
+
+static void workqueue_work_init(struct kwork_class *class,
+ struct kwork_work *work,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ char *modp = NULL;
+ unsigned long long function_addr = evsel__intval(evsel,
+ sample, "function");
+
+ work->class = class;
+ work->cpu = sample->cpu;
+ work->id = evsel__intval(evsel, sample, "work");
+ work->name = function_addr == 0 ? NULL :
+ machine__resolve_kernel_addr(machine, &function_addr, &modp);
+}
+
+static void workqueue_work_name(struct kwork_work *work, char *buf, int len)
+{
+ if (work->name != NULL)
+ snprintf(buf, len, "(w)%s", work->name);
+ else
+ snprintf(buf, len, "(w)0x%" PRIx64, work->id);
+}
+
+static struct kwork_class kwork_workqueue = {
+ .name = "workqueue",
+ .type = KWORK_CLASS_WORKQUEUE,
+ .nr_tracepoints = 3,
+ .tp_handlers = workqueue_tp_handlers,
+ .class_init = workqueue_class_init,
+ .work_init = workqueue_work_init,
+ .work_name = workqueue_work_name,
+};
+
+static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] = {
+ [KWORK_CLASS_IRQ] = &kwork_irq,
+ [KWORK_CLASS_SOFTIRQ] = &kwork_softirq,
+ [KWORK_CLASS_WORKQUEUE] = &kwork_workqueue,
+};
+
+static void print_separator(int len)
+{
+ printf(" %.*s\n", len, graph_dotted_line);
+}
+
+static int report_print_work(struct perf_kwork *kwork, struct kwork_work *work)
+{
+ int ret = 0;
+ char kwork_name[PRINT_KWORK_NAME_WIDTH];
+ char max_runtime_start[32], max_runtime_end[32];
+ char max_latency_start[32], max_latency_end[32];
+
+ printf(" ");
+
+ /*
+ * kwork name
+ */
+ if (work->class && work->class->work_name) {
+ work->class->work_name(work, kwork_name,
+ PRINT_KWORK_NAME_WIDTH);
+ ret += printf(" %-*s |", PRINT_KWORK_NAME_WIDTH, kwork_name);
+ } else {
+ ret += printf(" %-*s |", PRINT_KWORK_NAME_WIDTH, "");
+ }
+
+ /*
+ * cpu
+ */
+ ret += printf(" %0*d |", PRINT_CPU_WIDTH, work->cpu);
+
+ /*
+ * total runtime
+ */
+ if (kwork->report == KWORK_REPORT_RUNTIME) {
+ ret += printf(" %*.*f ms |",
+ PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)work->total_runtime / NSEC_PER_MSEC);
+ } else if (kwork->report == KWORK_REPORT_LATENCY) { // avg delay
+ ret += printf(" %*.*f ms |",
+ PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)work->total_latency /
+ work->nr_atoms / NSEC_PER_MSEC);
+ }
+
+ /*
+ * count
+ */
+ ret += printf(" %*" PRIu64 " |", PRINT_COUNT_WIDTH, work->nr_atoms);
+
+ /*
+ * max runtime, max runtime start, max runtime end
+ */
+ if (kwork->report == KWORK_REPORT_RUNTIME) {
+ timestamp__scnprintf_usec(work->max_runtime_start,
+ max_runtime_start,
+ sizeof(max_runtime_start));
+ timestamp__scnprintf_usec(work->max_runtime_end,
+ max_runtime_end,
+ sizeof(max_runtime_end));
+ ret += printf(" %*.*f ms | %*s s | %*s s |",
+ PRINT_RUNTIME_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)work->max_runtime / NSEC_PER_MSEC,
+ PRINT_TIMESTAMP_WIDTH, max_runtime_start,
+ PRINT_TIMESTAMP_WIDTH, max_runtime_end);
+ }
+ /*
+ * max delay, max delay start, max delay end
+ */
+ else if (kwork->report == KWORK_REPORT_LATENCY) {
+ timestamp__scnprintf_usec(work->max_latency_start,
+ max_latency_start,
+ sizeof(max_latency_start));
+ timestamp__scnprintf_usec(work->max_latency_end,
+ max_latency_end,
+ sizeof(max_latency_end));
+ ret += printf(" %*.*f ms | %*s s | %*s s |",
+ PRINT_LATENCY_WIDTH, RPINT_DECIMAL_WIDTH,
+ (double)work->max_latency / NSEC_PER_MSEC,
+ PRINT_TIMESTAMP_WIDTH, max_latency_start,
+ PRINT_TIMESTAMP_WIDTH, max_latency_end);
+ }
+
+ printf("\n");
+ return ret;
+}
+
+static int report_print_header(struct perf_kwork *kwork)
+{
+ int ret;
+
+ printf("\n ");
+ ret = printf(" %-*s | %-*s |",
+ PRINT_KWORK_NAME_WIDTH, "Kwork Name",
+ PRINT_CPU_WIDTH, "Cpu");
+
+ if (kwork->report == KWORK_REPORT_RUNTIME) {
+ ret += printf(" %-*s |",
+ PRINT_RUNTIME_HEADER_WIDTH, "Total Runtime");
+ } else if (kwork->report == KWORK_REPORT_LATENCY) {
+ ret += printf(" %-*s |",
+ PRINT_LATENCY_HEADER_WIDTH, "Avg delay");
+ }
+
+ ret += printf(" %-*s |", PRINT_COUNT_WIDTH, "Count");
+
+ if (kwork->report == KWORK_REPORT_RUNTIME) {
+ ret += printf(" %-*s | %-*s | %-*s |",
+ PRINT_RUNTIME_HEADER_WIDTH, "Max runtime",
+ PRINT_TIMESTAMP_HEADER_WIDTH, "Max runtime start",
+ PRINT_TIMESTAMP_HEADER_WIDTH, "Max runtime end");
+ } else if (kwork->report == KWORK_REPORT_LATENCY) {
+ ret += printf(" %-*s | %-*s | %-*s |",
+ PRINT_LATENCY_HEADER_WIDTH, "Max delay",
+ PRINT_TIMESTAMP_HEADER_WIDTH, "Max delay start",
+ PRINT_TIMESTAMP_HEADER_WIDTH, "Max delay end");
+ }
+
+ printf("\n");
+ print_separator(ret);
+ return ret;
+}
+
+static void timehist_print_header(void)
+{
+ /*
+ * header row
+ */
+ printf(" %-*s %-*s %-*s %-*s %-*s %-*s\n",
+ PRINT_TIMESTAMP_WIDTH, "Runtime start",
+ PRINT_TIMESTAMP_WIDTH, "Runtime end",
+ PRINT_TIMEHIST_CPU_WIDTH, "Cpu",
+ PRINT_KWORK_NAME_WIDTH, "Kwork name",
+ PRINT_RUNTIME_WIDTH, "Runtime",
+ PRINT_RUNTIME_WIDTH, "Delaytime");
+
+ /*
+ * units row
+ */
+ printf(" %-*s %-*s %-*s %-*s %-*s %-*s\n",
+ PRINT_TIMESTAMP_WIDTH, "",
+ PRINT_TIMESTAMP_WIDTH, "",
+ PRINT_TIMEHIST_CPU_WIDTH, "",
+ PRINT_KWORK_NAME_WIDTH, "(TYPE)NAME:NUM",
+ PRINT_RUNTIME_WIDTH, "(msec)",
+ PRINT_RUNTIME_WIDTH, "(msec)");
+
+ /*
+ * separator
+ */
+ printf(" %.*s %.*s %.*s %.*s %.*s %.*s\n",
+ PRINT_TIMESTAMP_WIDTH, graph_dotted_line,
+ PRINT_TIMESTAMP_WIDTH, graph_dotted_line,
+ PRINT_TIMEHIST_CPU_WIDTH, graph_dotted_line,
+ PRINT_KWORK_NAME_WIDTH, graph_dotted_line,
+ PRINT_RUNTIME_WIDTH, graph_dotted_line,
+ PRINT_RUNTIME_WIDTH, graph_dotted_line);
+}
+
+static void print_summary(struct perf_kwork *kwork)
+{
+ u64 time = kwork->timeend - kwork->timestart;
+
+ printf(" Total count : %9" PRIu64 "\n", kwork->all_count);
+ printf(" Total runtime (msec) : %9.3f (%.3f%% load average)\n",
+ (double)kwork->all_runtime / NSEC_PER_MSEC,
+ time == 0 ? 0 : (double)kwork->all_runtime / time);
+ printf(" Total time span (msec) : %9.3f\n",
+ (double)time / NSEC_PER_MSEC);
+}
+
+static unsigned long long nr_list_entry(struct list_head *head)
+{
+ struct list_head *pos;
+ unsigned long long n = 0;
+
+ list_for_each(pos, head)
+ n++;
+
+ return n;
+}
+
+static void print_skipped_events(struct perf_kwork *kwork)
+{
+ int i;
+ const char *const kwork_event_str[] = {
+ [KWORK_TRACE_RAISE] = "raise",
+ [KWORK_TRACE_ENTRY] = "entry",
+ [KWORK_TRACE_EXIT] = "exit",
+ };
+
+ if ((kwork->nr_skipped_events[KWORK_TRACE_MAX] != 0) &&
+ (kwork->nr_events != 0)) {
+ printf(" INFO: %.3f%% skipped events (%" PRIu64 " including ",
+ (double)kwork->nr_skipped_events[KWORK_TRACE_MAX] /
+ (double)kwork->nr_events * 100.0,
+ kwork->nr_skipped_events[KWORK_TRACE_MAX]);
+
+ for (i = 0; i < KWORK_TRACE_MAX; i++) {
+ printf("%" PRIu64 " %s%s",
+ kwork->nr_skipped_events[i],
+ kwork_event_str[i],
+ (i == KWORK_TRACE_MAX - 1) ? ")\n" : ", ");
+ }
+ }
+
+ if (verbose > 0)
+ printf(" INFO: use %lld atom pages\n",
+ nr_list_entry(&kwork->atom_page_list));
+}
+
+static void print_bad_events(struct perf_kwork *kwork)
+{
+ if ((kwork->nr_lost_events != 0) && (kwork->nr_events != 0)) {
+ printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
+ (double)kwork->nr_lost_events /
+ (double)kwork->nr_events * 100.0,
+ kwork->nr_lost_events, kwork->nr_events,
+ kwork->nr_lost_chunks);
+ }
+}
+
+static void work_sort(struct perf_kwork *kwork, struct kwork_class *class)
+{
+ struct rb_node *node;
+ struct kwork_work *data;
+ struct rb_root_cached *root = &class->work_root;
+
+ pr_debug("Sorting %s ...\n", class->name);
+ for (;;) {
+ node = rb_first_cached(root);
+ if (!node)
+ break;
+
+ rb_erase_cached(node, root);
+ data = rb_entry(node, struct kwork_work, node);
+ work_insert(&kwork->sorted_work_root,
+ data, &kwork->sort_list);
+ }
+}
+
+static void perf_kwork__sort(struct perf_kwork *kwork)
+{
+ struct kwork_class *class;
+
+ list_for_each_entry(class, &kwork->class_list, list)
+ work_sort(kwork, class);
+}
+
+static int perf_kwork__check_config(struct perf_kwork *kwork,
+ struct perf_session *session)
+{
+ int ret;
+ struct evsel *evsel;
+ struct kwork_class *class;
+
+ static struct trace_kwork_handler report_ops = {
+ .entry_event = report_entry_event,
+ .exit_event = report_exit_event,
+ };
+ static struct trace_kwork_handler latency_ops = {
+ .raise_event = latency_raise_event,
+ .entry_event = latency_entry_event,
+ };
+ static struct trace_kwork_handler timehist_ops = {
+ .raise_event = timehist_raise_event,
+ .entry_event = timehist_entry_event,
+ .exit_event = timehist_exit_event,
+ };
+
+ switch (kwork->report) {
+ case KWORK_REPORT_RUNTIME:
+ kwork->tp_handler = &report_ops;
+ break;
+ case KWORK_REPORT_LATENCY:
+ kwork->tp_handler = &latency_ops;
+ break;
+ case KWORK_REPORT_TIMEHIST:
+ kwork->tp_handler = &timehist_ops;
+ break;
+ default:
+ pr_debug("Invalid report type %d\n", kwork->report);
+ return -1;
+ }
+
+ list_for_each_entry(class, &kwork->class_list, list)
+ if ((class->class_init != NULL) &&
+ (class->class_init(class, session) != 0))
+ return -1;
+
+ if (kwork->cpu_list != NULL) {
+ ret = perf_session__cpu_bitmap(session,
+ kwork->cpu_list,
+ kwork->cpu_bitmap);
+ if (ret < 0) {
+ pr_err("Invalid cpu bitmap\n");
+ return -1;
+ }
+ }
+
+ if (kwork->time_str != NULL) {
+ ret = perf_time__parse_str(&kwork->ptime, kwork->time_str);
+ if (ret != 0) {
+ pr_err("Invalid time span\n");
+ return -1;
+ }
+ }
+
+ list_for_each_entry(evsel, &session->evlist->core.entries, core.node) {
+ if (kwork->show_callchain && !evsel__has_callchain(evsel)) {
+ pr_debug("Samples do not have callchains\n");
+ kwork->show_callchain = 0;
+ symbol_conf.use_callchain = 0;
+ }
+ }
+
+ return 0;
+}
+
+static int perf_kwork__read_events(struct perf_kwork *kwork)
+{
+ int ret = -1;
+ struct perf_session *session = NULL;
+
+ struct perf_data data = {
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ .force = kwork->force,
+ };
+
+ session = perf_session__new(&data, &kwork->tool);
+ if (IS_ERR(session)) {
+ pr_debug("Error creating perf session\n");
+ return PTR_ERR(session);
+ }
+
+ symbol__init(&session->header.env);
+
+ if (perf_kwork__check_config(kwork, session) != 0)
+ goto out_delete;
+
+ if (session->tevent.pevent &&
+ tep_set_function_resolver(session->tevent.pevent,
+ machine__resolve_kernel_addr,
+ &session->machines.host) < 0) {
+ pr_err("Failed to set libtraceevent function resolver\n");
+ goto out_delete;
+ }
+
+ if (kwork->report == KWORK_REPORT_TIMEHIST)
+ timehist_print_header();
+
+ ret = perf_session__process_events(session);
+ if (ret) {
+ pr_debug("Failed to process events, error %d\n", ret);
+ goto out_delete;
+ }
+
+ kwork->nr_events = session->evlist->stats.nr_events[0];
+ kwork->nr_lost_events = session->evlist->stats.total_lost;
+ kwork->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
+
+out_delete:
+ perf_session__delete(session);
+ return ret;
+}
+
+static void process_skipped_events(struct perf_kwork *kwork,
+ struct kwork_work *work)
+{
+ int i;
+ unsigned long long count;
+
+ for (i = 0; i < KWORK_TRACE_MAX; i++) {
+ count = nr_list_entry(&work->atom_list[i]);
+ kwork->nr_skipped_events[i] += count;
+ kwork->nr_skipped_events[KWORK_TRACE_MAX] += count;
+ }
+}
+
+struct kwork_work *perf_kwork_add_work(struct perf_kwork *kwork,
+ struct kwork_class *class,
+ struct kwork_work *key)
+{
+ struct kwork_work *work = NULL;
+
+ work = work_new(key);
+ if (work == NULL)
+ return NULL;
+
+ work_insert(&class->work_root, work, &kwork->cmp_id);
+ return work;
+}
+
+static void sig_handler(int sig)
+{
+ /*
+ * Simply capture termination signal so that
+ * the program can continue after pause returns
+ */
+ pr_debug("Captuer signal %d\n", sig);
+}
+
+static int perf_kwork__report_bpf(struct perf_kwork *kwork)
+{
+ int ret;
+
+ signal(SIGINT, sig_handler);
+ signal(SIGTERM, sig_handler);
+
+ ret = perf_kwork__trace_prepare_bpf(kwork);
+ if (ret)
+ return -1;
+
+ printf("Starting trace, Hit <Ctrl+C> to stop and report\n");
+
+ perf_kwork__trace_start();
+
+ /*
+ * a simple pause, wait here for stop signal
+ */
+ pause();
+
+ perf_kwork__trace_finish();
+
+ perf_kwork__report_read_bpf(kwork);
+
+ perf_kwork__report_cleanup_bpf();
+
+ return 0;
+}
+
+static int perf_kwork__report(struct perf_kwork *kwork)
+{
+ int ret;
+ struct rb_node *next;
+ struct kwork_work *work;
+
+ if (kwork->use_bpf)
+ ret = perf_kwork__report_bpf(kwork);
+ else
+ ret = perf_kwork__read_events(kwork);
+
+ if (ret != 0)
+ return -1;
+
+ perf_kwork__sort(kwork);
+
+ setup_pager();
+
+ ret = report_print_header(kwork);
+ next = rb_first_cached(&kwork->sorted_work_root);
+ while (next) {
+ work = rb_entry(next, struct kwork_work, node);
+ process_skipped_events(kwork, work);
+
+ if (work->nr_atoms != 0) {
+ report_print_work(kwork, work);
+ if (kwork->summary) {
+ kwork->all_runtime += work->total_runtime;
+ kwork->all_count += work->nr_atoms;
+ }
+ }
+ next = rb_next(next);
+ }
+ print_separator(ret);
+
+ if (kwork->summary) {
+ print_summary(kwork);
+ print_separator(ret);
+ }
+
+ print_bad_events(kwork);
+ print_skipped_events(kwork);
+ printf("\n");
+
+ return 0;
+}
+
+typedef int (*tracepoint_handler)(struct perf_tool *tool,
+ struct evsel *evsel,
+ struct perf_sample *sample,
+ struct machine *machine);
+
+static int perf_kwork__process_tracepoint_sample(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct evsel *evsel,
+ struct machine *machine)
+{
+ int err = 0;
+
+ if (evsel->handler != NULL) {
+ tracepoint_handler f = evsel->handler;
+
+ err = f(tool, evsel, sample, machine);
+ }
+
+ return err;
+}
+
+static int perf_kwork__timehist(struct perf_kwork *kwork)
+{
+ /*
+ * event handlers for timehist option
+ */
+ kwork->tool.comm = perf_event__process_comm;
+ kwork->tool.exit = perf_event__process_exit;
+ kwork->tool.fork = perf_event__process_fork;
+ kwork->tool.attr = perf_event__process_attr;
+ kwork->tool.tracing_data = perf_event__process_tracing_data;
+ kwork->tool.build_id = perf_event__process_build_id;
+ kwork->tool.ordered_events = true;
+ kwork->tool.ordering_requires_timestamps = true;
+ symbol_conf.use_callchain = kwork->show_callchain;
+
+ if (symbol__validate_sym_arguments()) {
+ pr_err("Failed to validate sym arguments\n");
+ return -1;
+ }
+
+ setup_pager();
+
+ return perf_kwork__read_events(kwork);
+}
+
+static void setup_event_list(struct perf_kwork *kwork,
+ const struct option *options,
+ const char * const usage_msg[])
+{
+ int i;
+ struct kwork_class *class;
+ char *tmp, *tok, *str;
+
+ if (kwork->event_list_str == NULL)
+ goto null_event_list_str;
+
+ str = strdup(kwork->event_list_str);
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ for (i = 0; i < KWORK_CLASS_MAX; i++) {
+ class = kwork_class_supported_list[i];
+ if (strcmp(tok, class->name) == 0) {
+ list_add_tail(&class->list, &kwork->class_list);
+ break;
+ }
+ }
+ if (i == KWORK_CLASS_MAX) {
+ usage_with_options_msg(usage_msg, options,
+ "Unknown --event key: `%s'", tok);
+ }
+ }
+ free(str);
+
+null_event_list_str:
+ /*
+ * config all kwork events if not specified
+ */
+ if (list_empty(&kwork->class_list)) {
+ for (i = 0; i < KWORK_CLASS_MAX; i++) {
+ list_add_tail(&kwork_class_supported_list[i]->list,
+ &kwork->class_list);
+ }
+ }
+
+ pr_debug("Config event list:");
+ list_for_each_entry(class, &kwork->class_list, list)
+ pr_debug(" %s", class->name);
+ pr_debug("\n");
+}
+
+static int perf_kwork__record(struct perf_kwork *kwork,
+ int argc, const char **argv)
+{
+ const char **rec_argv;
+ unsigned int rec_argc, i, j;
+ struct kwork_class *class;
+
+ const char *const record_args[] = {
+ "record",
+ "-a",
+ "-R",
+ "-m", "1024",
+ "-c", "1",
+ };
+
+ rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+
+ list_for_each_entry(class, &kwork->class_list, list)
+ rec_argc += 2 * class->nr_tracepoints;
+
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+ if (rec_argv == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = strdup(record_args[i]);
+
+ list_for_each_entry(class, &kwork->class_list, list) {
+ for (j = 0; j < class->nr_tracepoints; j++) {
+ rec_argv[i++] = strdup("-e");
+ rec_argv[i++] = strdup(class->tp_handlers[j].name);
+ }
+ }
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ pr_debug("record comm: ");
+ for (j = 0; j < rec_argc; j++)
+ pr_debug("%s ", rec_argv[j]);
+ pr_debug("\n");
+
+ return cmd_record(i, rec_argv);
+}
+
+int cmd_kwork(int argc, const char **argv)
+{
+ static struct perf_kwork kwork = {
+ .class_list = LIST_HEAD_INIT(kwork.class_list),
+ .tool = {
+ .mmap = perf_event__process_mmap,
+ .mmap2 = perf_event__process_mmap2,
+ .sample = perf_kwork__process_tracepoint_sample,
+ .ordered_events = true,
+ },
+ .atom_page_list = LIST_HEAD_INIT(kwork.atom_page_list),
+ .sort_list = LIST_HEAD_INIT(kwork.sort_list),
+ .cmp_id = LIST_HEAD_INIT(kwork.cmp_id),
+ .sorted_work_root = RB_ROOT_CACHED,
+ .tp_handler = NULL,
+ .profile_name = NULL,
+ .cpu_list = NULL,
+ .time_str = NULL,
+ .force = false,
+ .event_list_str = NULL,
+ .summary = false,
+ .sort_order = NULL,
+ .show_callchain = false,
+ .max_stack = 5,
+ .timestart = 0,
+ .timeend = 0,
+ .nr_events = 0,
+ .nr_lost_chunks = 0,
+ .nr_lost_events = 0,
+ .all_runtime = 0,
+ .all_count = 0,
+ .nr_skipped_events = { 0 },
+ };
+ static const char default_report_sort_order[] = "runtime, max, count";
+ static const char default_latency_sort_order[] = "avg, max, count";
+ const struct option kwork_options[] = {
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_STRING('k', "kwork", &kwork.event_list_str, "kwork",
+ "list of kwork to profile (irq, softirq, workqueue, etc)"),
+ OPT_BOOLEAN('f', "force", &kwork.force, "don't complain, do it"),
+ OPT_END()
+ };
+ const struct option report_options[] = {
+ OPT_STRING('s', "sort", &kwork.sort_order, "key[,key2...]",
+ "sort by key(s): runtime, max, count"),
+ OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+ "list of cpus to profile"),
+ OPT_STRING('n', "name", &kwork.profile_name, "name",
+ "event name to profile"),
+ OPT_STRING(0, "time", &kwork.time_str, "str",
+ "Time span for analysis (start,stop)"),
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+ OPT_BOOLEAN('S', "with-summary", &kwork.summary,
+ "Show summary with statistics"),
+#ifdef HAVE_BPF_SKEL
+ OPT_BOOLEAN('b', "use-bpf", &kwork.use_bpf,
+ "Use BPF to measure kwork runtime"),
+#endif
+ OPT_PARENT(kwork_options)
+ };
+ const struct option latency_options[] = {
+ OPT_STRING('s', "sort", &kwork.sort_order, "key[,key2...]",
+ "sort by key(s): avg, max, count"),
+ OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+ "list of cpus to profile"),
+ OPT_STRING('n', "name", &kwork.profile_name, "name",
+ "event name to profile"),
+ OPT_STRING(0, "time", &kwork.time_str, "str",
+ "Time span for analysis (start,stop)"),
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+#ifdef HAVE_BPF_SKEL
+ OPT_BOOLEAN('b', "use-bpf", &kwork.use_bpf,
+ "Use BPF to measure kwork latency"),
+#endif
+ OPT_PARENT(kwork_options)
+ };
+ const struct option timehist_options[] = {
+ OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+ "file", "vmlinux pathname"),
+ OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
+ "file", "kallsyms pathname"),
+ OPT_BOOLEAN('g', "call-graph", &kwork.show_callchain,
+ "Display call chains if present"),
+ OPT_UINTEGER(0, "max-stack", &kwork.max_stack,
+ "Maximum number of functions to display backtrace."),
+ OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+ "Look for files with symbols relative to this directory"),
+ OPT_STRING(0, "time", &kwork.time_str, "str",
+ "Time span for analysis (start,stop)"),
+ OPT_STRING('C', "cpu", &kwork.cpu_list, "cpu",
+ "list of cpus to profile"),
+ OPT_STRING('n', "name", &kwork.profile_name, "name",
+ "event name to profile"),
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+ OPT_PARENT(kwork_options)
+ };
+ const char *kwork_usage[] = {
+ NULL,
+ NULL
+ };
+ const char * const report_usage[] = {
+ "perf kwork report [<options>]",
+ NULL
+ };
+ const char * const latency_usage[] = {
+ "perf kwork latency [<options>]",
+ NULL
+ };
+ const char * const timehist_usage[] = {
+ "perf kwork timehist [<options>]",
+ NULL
+ };
+ const char *const kwork_subcommands[] = {
+ "record", "report", "latency", "timehist", NULL
+ };
+
+ argc = parse_options_subcommand(argc, argv, kwork_options,
+ kwork_subcommands, kwork_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc)
+ usage_with_options(kwork_usage, kwork_options);
+
+ setup_event_list(&kwork, kwork_options, kwork_usage);
+ sort_dimension__add(&kwork, "id", &kwork.cmp_id);
+
+ if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
+ return perf_kwork__record(&kwork, argc, argv);
+ else if (strlen(argv[0]) > 2 && strstarts("report", argv[0])) {
+ kwork.sort_order = default_report_sort_order;
+ if (argc > 1) {
+ argc = parse_options(argc, argv, report_options, report_usage, 0);
+ if (argc)
+ usage_with_options(report_usage, report_options);
+ }
+ kwork.report = KWORK_REPORT_RUNTIME;
+ setup_sorting(&kwork, report_options, report_usage);
+ return perf_kwork__report(&kwork);
+ } else if (strlen(argv[0]) > 2 && strstarts("latency", argv[0])) {
+ kwork.sort_order = default_latency_sort_order;
+ if (argc > 1) {
+ argc = parse_options(argc, argv, latency_options, latency_usage, 0);
+ if (argc)
+ usage_with_options(latency_usage, latency_options);
+ }
+ kwork.report = KWORK_REPORT_LATENCY;
+ setup_sorting(&kwork, latency_options, latency_usage);
+ return perf_kwork__report(&kwork);
+ } else if (strlen(argv[0]) > 2 && strstarts("timehist", argv[0])) {
+ if (argc > 1) {
+ argc = parse_options(argc, argv, timehist_options, timehist_usage, 0);
+ if (argc)
+ usage_with_options(timehist_usage, timehist_options);
+ }
+ kwork.report = KWORK_REPORT_TIMEHIST;
+ return perf_kwork__timehist(&kwork);
+ } else
+ usage_with_options(kwork_usage, kwork_options);
+
+ return 0;
+}